EP 0296018 A1 19881221 - Spacer grid for fuel assembly of a light water nuclear reactor.
Title (en)
Spacer grid for fuel assembly of a light water nuclear reactor.
Title (de)
Abstandshaltegitter für Brennstabbündel eines Leichtwasserkernreaktors.
Title (fr)
Grille-entretoise pour un assemblage combustible d'un réacteur nucléaire à eau légère.
Publication
Application
Priority
FR 8708006 A 19870609
Abstract (en)
[origin: JPS6465491A] PURPOSE: To simplify the structure of a spacer grid for fuel assembly and reduce the cost of the grid by providing at least one integrated plate and a group of holes for the fuel rod and guide tube of a fuel assembly through the plate. CONSTITUTION: The opening 2 of a plate 1 is worked so that the wall sections 3 of the cell of a spacer grid can have thick sections 4 protruded into two adjacent cells from both sides at their centers. A fuel rod 5 is supported by the thick sections 4. In addition, the wall sections of some 2' of the openings 2 of the spacer grid have no thick sections 4. In the openings 2', guide tubes 6 having a diameter larger than that of the fuel rod 5 are held. When the openings 2 and 2' are provided through the plate 1 in such a way, the cost of the fuel assembly can be reduced, because the spacer grid holds the fuel rods 5 and guide tubes 6 with a simple structure, constitutes a passage for cooling water, and so on.
Abstract (fr)
La grille entretoise comporte au moins une plaque monobloc (1) traversée par un ensemble d'ouvertures (2) dont une partie au moins constitue un réseau régulier de logements (2) pour l'ensemble des crayons combustibles et des tubes-guides de l'assemblage. La grille-entretoise peut être constituée par une seule plaque monobloc (1) de forte épaisseur ou par l'association de plusieurs plaques monobloc disposées parallèlement les unes aux autres et liées entre elles par une ceinture extérieure.
IPC 1-7
IPC 8 full level
G21C 3/34 (2006.01)
CPC (source: EP KR US)
G21C 3/34 (2013.01 - KR); G21C 3/3408 (2013.01 - EP US); Y02E 30/30 (2013.01 - EP US)
Citation (search report)
- [X] FR 2162641 A1 19730720 - SIEMENS AG
- [A] FR 2368117 A1 19780512 - KRAFTWERK UNION AG [DE], et al
- [A] US 4312706 A 19820126 - SNYDER JR HAROLD J, et al
Designated contracting state (EPC)
BE CH DE ES GB LI SE
DOCDB simple family (publication)
EP 0296018 A1 19881221; FR 2616577 A1 19881216; FR 2616577 B1 19910215; JP S6465491 A 19890310; KR 890001108 A 19890318; US 4933138 A 19900612; ZA 884000 B 19890530
DOCDB simple family (application)
EP 88401371 A 19880606; FR 8708006 A 19870609; JP 14273688 A 19880609; KR 880006891 A 19880609; US 20431988 A 19880609; ZA 884000 A 19880606